﻿/* dk2Repository - Copyright (C) 2011 Daniel Kuczewski http://www.dk2.de/

 * This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */

using dk2Repository.Interfaces;

namespace dk2Repository
{
    class ColumnSetter : IValueSetter
    {
        private Columns.Column _cm;

        public ColumnSetter(Columns.Column cm)
        {
            _cm = cm;

        }

        public void SetDbValue(object item, object value)
        {
            _cm.SetDbValue(item, value);
        }
    }

    class ValueSetters : IValueSetter
    {
        private readonly References.Reference _reference;
        private readonly Columns.Column _cm;

        public ValueSetters(References.Reference reference, Columns.Column cm)
        {
            _reference = reference;
            _cm = cm;
        }

        public void SetDbValue(object item, object value)
        {
                
            if(value==System.DBNull.Value)
                return;

            var refitem = _reference.GetReferenceItem(item);

            if (refitem == null)
            {
                refitem = _reference.ReferenceMapping.CreateInstance();
                _reference.SetReferenceItem(item, refitem);
            }
                    
            _cm.SetDbValue(refitem, value);
        }
    }

    class NullSetter : IValueSetter
    {
        public void SetDbValue(object item, object value) { }
    }
}